It has been recently found that nonlinear interaction of counterpropagating plasma wakes with different potential profiles can generate high-power narrowband THz radiation. Such radiation is concentrated near the second harmonic of the plasma frequency with the line width of several percent and can easily escape from the plasma. In this work, we discuss effects of ion dynamics on THz emission duration in the case of short laser drivers and study whether the radiation efficiency in such a scheme can be significantly increased by using long-pulse electron beams driving plasma waves via the two-stream instability. This mechanism can be a basis for efficient and easily tunable sources of narrow-band terahertz radiation capable of reaching the gigawatt power level and millijoule energy content.
|Title of host publication||2018 43rd International Conference on Infrared Millimeter and Terahertz Waves, IRMMW-THz 2018|
|Publisher||IEEE Computer Society|
|Publication status||Published - 25 Oct 2018|
|Event||43rd International Conference on Infrared Millimeter and Terahertz Waves, IRMMW-THz 2018 - Nagoya, Japan|
Duration: 9 Sep 2018 → 14 Sep 2018
|Conference||43rd International Conference on Infrared Millimeter and Terahertz Waves, IRMMW-THz 2018|
|Period||09.09.2018 → 14.09.2018|